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yay freshman bio

What are unborn pigs called?

fetal

What is meant by gestation period?

length of conception to birth

How is their age (length of gestation) determined?

by measuring length of the fetal pig

How long does full gestation take?

17 weeks

What is the pig's kingdom?

animalia

What is the pig's phylum?

chordata

What is the pig's class?

mammalia

What is the pig's order?

artiodactyla

What is the pig's family?

suidae

What is the pig's genus?

sus

What is the pig's species?

domestica

What type of external features are used to separate mammals into orders?

-method of movement
-teeth

Name the two external characteristics which distinguish mammals from other mammals?

-hair during development
-females have mammary glands with openings to nourish their young

Approximately how many piglets does a sow have in a litter?

8-12

rostral

pertaining to the head

anterior

forward

rostral

toward the nose

caudal

pertaining to the tail

dorsal

toward the backbone

ventral

toward the belly

lateral

toward the side

medical

toward the midline

proximal

nearest the reference point

distal

farthest from the reference area

cranial

head area

cervical

neck area

thoracic

upper trunk

abdominal

middle trunk

lumbar

lower trunk

caudal

tail area

Is a pig a biped or quadruped? Explain

quadruped; 4 legs

Is the pig digitigrade, unguligrade, or plantigrade? Explain

unguligrade; it walks on the tips of its toes

Are pigs herbivores, carnivores, or omnivores? Explain

omnivores; they eat everything

What goes in and out of the external nares?

moist and warm air

What is another word for pinna? What is its function?

auricle; it catches noises for the eardrum

What is the function of the pig's vibrissae? Explain

it is a sensory facilitator; it helps mammals feel their way around in the dark

What is the function of the pig's nictitating membrane? Explain

It is a third eyelid, it is a vestigial organ that ancestors used to protect/moisten the eye

What is another name for the chest region of the pig?

thorax

What is another name for the "belly" region of the pig?

abdomen

Why is the fetal pig a good specimen to dissect?

it has similar anatomy to the human

Tissue that makes up skin?

epitrichium

List the major organs in the thoracic cavity

trachea, heart, lungs, bronchial tubes, thyroid gland, larynx

List the major organs in the abdominal cavity

liver, stomach, spleen, intestine, kidney, gall bladder, urinary bladder

What is the function of the umbilical cord?

to give fetal pig nourishment

What two cavities does the diaphragm separate?

thoracic and abdominal

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